| 基于推覆分析的钢框架结构地震倒塌判别准则研究 |
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| 引用本文： | 黄永安.基于推覆分析的钢框架结构地震倒塌判别准则研究[J].世界地震工程,2018,34(2):166-174. |
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| 作者姓名： | 黄永安 |
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| 作者单位： | 中铁第一勘察设计院集团有限公司, 西安 710043 |
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| 摘 要： | 结构地震倒塌判别准则是工程结构强震分析的关键问题。在层损伤模型的基础上，建立了基于推覆分析的建筑结构整体损伤模型，并以国内某2层2跨平面钢框架结构拟静力试验为背景，应用有限元程序ABAQUS对平面钢框架进行了强震倒塌数值模拟。分析了钢框架结构的倒塌破坏过程，基于建议地震倒塌判别准则研究了钢框架结构的损伤演化规律。结果表明:钢框架结构在强震作用下的损伤发展顺序与塑性发展顺序一致；基于推覆分析的结构整体损伤模型能较好的体现强震作用下钢框架结构的损伤演化规律，且在上下界处收敛；强震作用下，钢框架结构的初始损伤主要由结构的残余侧移引起，而后期损伤主要由结构的承载力和刚度退化引起。
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| 关 键 词： | 钢框架 损伤模型 强震倒塌 数值模拟 |
Study on seismic collapse criterion of steel frame structures based on pushover analysis |
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| HUANG Yongan.Study on seismic collapse criterion of steel frame structures based on pushover analysis[J].World Information On Earthquake Engineering,2018,34(2):166-174. |
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| Authors: | HUANG Yongan |
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| Affiliation: | China Railway First Survey and Design Institute Group LTD, Xi’an 710043, China |
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| Abstract: | The criterion of structural seismic collapse is the key problem for analyzing structures under strong earthquake attacking. Based on the layer damage model, this paper established a damage model of building structure based on pushover analysis. By selecting a two-story, two-span plane steel frame structure tested in China under cyclic loading, the finite element program ABAQUS was utilized to simulate the collapse behavior of the steel frame structure under strong earthquake attacking. The collapse process of steel frame structure is analyzed, and the damage evolution mechanism of steel frame structure was studied based on the proposed criterion of seismic collapse. The results show that the sequence of damage development of steel frame structure under strong earthquake is consistent with that of plastic development; the damage model of the structure based on pushover analysis reflects the damage evolution mechanism of the steel frame structure well subjected to strong earthquakes, and has good converge at the upper and lower bounds. Under strong earthquake attacking, the initial damage of the steel frame structure is mainly caused by the residual lateral displacement of the structure, and the damage raised at the final stage is mainly caused by the degradation of the strength and the stiffness of the structure. |
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| Keywords: | steel frame damage model strong earthquake collapse numerical simulation |
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